WO2002092971A1 - Systeme de commande electromagnetique - Google Patents

Systeme de commande electromagnetique Download PDF

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Publication number
WO2002092971A1
WO2002092971A1 PCT/EP2002/005287 EP0205287W WO02092971A1 WO 2002092971 A1 WO2002092971 A1 WO 2002092971A1 EP 0205287 W EP0205287 W EP 0205287W WO 02092971 A1 WO02092971 A1 WO 02092971A1
Authority
WO
WIPO (PCT)
Prior art keywords
electromagnetic
valve
armature
clamping
actuating device
Prior art date
Application number
PCT/EP2002/005287
Other languages
German (de)
English (en)
Inventor
Heinz Leiber
Original Assignee
Heinz Leiber
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE10220199A external-priority patent/DE10220199A1/de
Application filed by Heinz Leiber filed Critical Heinz Leiber
Priority to US10/477,647 priority Critical patent/US20040169988A1/en
Priority to EP02735357A priority patent/EP1387927A1/fr
Publication of WO2002092971A1 publication Critical patent/WO2002092971A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
    • F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L2013/0089—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque with means for delaying valve closing
    • F01L2013/0094—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque with means for delaying valve closing with switchable clamp for keeping valve open
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
    • F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
    • F01L9/24—Piezo-electric actuators

Definitions

  • the invention relates to an electromagnetic actuating device with the features of the preamble of claim 1.
  • Such an actuator is known from DE 197 12 062 AI.
  • Controlling the control devices so that the associated valves are operated in the partial stroke means stopping of the valve with a relatively large air gap, which is only possible with relatively large electrical currents, thereby reducing the consumption savings.
  • the invention has for its object to design the actuating device so that this additional energy consumption does not occur.
  • the holding system can act directly on the armature and hold it in place, but can also act on the valve, in particular its stem or an actuating part present between the armature and valve, and thereby hold the armature indirectly.
  • the holding system can be a locking system, as is known in principle from DE 197 12 062A1, or a clamping system, as will be described in more detail later.
  • the invention is applicable to actuators in which the armature performs a linear movement, such as. B. from DE 195 21 078 AI known, as well as those in which the armature performs a pivoting movement.
  • the invention can be used particularly advantageously with a twin arrangement of two or more valves.
  • the valves are arranged in a row.
  • the actuators which actuate the valves and have pivotable armatures, are arranged alternately to the left and right of the valves.
  • the active part of the locking system namely at least one electromagnet and possibly. also a force directed against the force of this electromagnet, e.g. B. a spring force or a permanent magnet system for the two valves of a twin can be used.
  • This arrangement can also be used without partial stroke training.
  • the partial stroke e.g. B. 1mm can be achieved with the invention with very low power.
  • the locking system can be designed in such a way that it works almost wear-free in connection with the control of the main magnet.
  • Electromagnetic actuators in the magnetic circuit are optimized for low holding power. Small air gaps and low iron losses are therefore necessary. Therefore avoiding saturation of the iron circle.
  • a conventional system To start the system, a conventional system must be moved from the middle position to the end position by periodic oscillation and / or large current intensities, which places a great strain on the vehicle electrical system. This is critical when starting the engine, since the starter's electrical system load is already high.
  • the anchor When using the holding system according to the invention, the anchor can be held in an end position or in the intermediate position, so that it goes into operation immediately when starting. You can e.g. B. to achieve different partial strokes of z. B. 0.5 and 1mm provide two corresponding intermediate positions of the actuating device. With appropriate training, the retention system works almost wear-free. The electrical energy consumption of the retention system is very low.
  • Fig. 1 shows an embodiment in which the
  • Fig. 2 shows the same embodiment with the detent lever raised
  • Figure 3 is a diagram in which the valve is temporarily placed in a partial stroke position.
  • Fig. 4 shows an embodiment in which the valve is held by a clamp.
  • actuating devices 1 and 2 which act on valve stems 9a and 10a arranged one behind the other. They are arranged on different sides of the valves and also offset from one another in the direction of the paper planes.
  • the actuating device 1 and accordingly also the actuating device 2 have a lever 3 which is pivotably mounted at 4 and in which the armature of the actuating device is integrated.
  • Two electromagnets 5 and 6, each with a winding 5a or 6a, are provided in each actuating device.
  • Two opposing spring forces act on the lever 3, namely a valve spring 7 and a torsion bar 8 which acts on the bearing.
  • the lever 3 is between the two on the two adjusting devices 1 and 2 end positions shown pivoted back and forth and thereby brought the valve 9 into the two end positions shown with I and III, namely valve fully open (III) and valve closed (I).
  • Each locking system has a locking lever 11 and 11 ⁇ which is pivotably mounted at 11a and which is pressed to the left or right by a spring 12.
  • the lever 3 is somewhat narrower at its free end and there it has counter-detents 3a into which the end of the detent lever 11 snaps.
  • the locking lever 11 is drawn into the lowest counter-locking, which corresponds to the closed valve.
  • a second counter-latching mechanism 3a is shown right next to it.
  • Rast (electro) magnet 13 provided. If its winding 13a is energized, the latching lever is pulled out of the latching mechanism to the right and the lever 3 is moved downward by the force of the spring 8.
  • the lever 3 formed on the nose 3a ⁇ locked in an opening 11b on the locking lever 11 and holds the lever in this second end position (as shown for the adjusting device 2) without further energization of the trapping magnet fixed.
  • the prerequisite is, of course, that the energization of the locking magnet has been ended beforehand, so that the nose 3a ⁇ of the lever 3 rests against the free end of the locking lever 11 and can finally snap into place.
  • FIG. 2 which otherwise corresponds to FIG. 1, the unlatched state is shown for the latching lever 11.
  • this unlocking position of the locking lever can be maintained until the desired locking position is approximately reached, thus largely avoiding the grinding of the nose 3a ⁇ on the locking lever 11, which results in a substantial freedom from wear.
  • Magnetic force of the detent magnet necessary to briefly energize the corresponding electromagnet 5 or 6 to unlock the detent lever, that is, for. B. to unlock the locking lever 11 from the position shown on the left in FIG. 1, the electromagnet 5.
  • the drawing shows the peculiarity that the locking magnet 13 and the spring 12 are responsible for the locking levers 11 and 11 ⁇ of the two actuating devices 1 and 2 shown, which form a so-called twin.
  • the two actuators can work in parallel or separately. Should z. B. only one valve work, the locking magnet is switched as described.
  • the closing magnet 5, or the corresponding magnet of the actuating device 2 is not energized in the case of the valve, which is not working, ie is to remain closed.
  • FIG. 3a the stroke of the armature or the valve S v
  • FIG. 3b the stroke of the locking lever S R
  • FIG. 3c the current profile i R of the locking magnet
  • FIG. 3d the current i Mi in the closing magnet 5
  • FIG. 3e shows the current i M2 of the opening magnet 6 over time.
  • Opening magnet 6 turned on, with the help of that
  • Valve is brought into the other end position III.
  • the current of the closing magnet is then reduced to a value that is sufficient for holding.
  • the holding current i M2 is switched off and the valve 9 is now accelerated in the opposite direction by the valve spring 7.
  • the catching current i M ⁇ of the magnet 5 is switched on, which brings the valve into the other end position I and holds it with a holding current until the latching lever 11 is engaged.
  • Locking lever when snapping has a reaction on the current ⁇ R (at T 7 ). Since the locking position is a fixed position, this current change (because of the mutual induction initiated by the armature movement) can at least be used as an auxiliary signal for determining the position, e.g. B. can be used to calibrate a position sensor.
  • the unlatching is initiated at T x ⁇ or T 2 ⁇ .
  • the current of the magnet 5 is only switched off briefly in order to enable the valve movement.
  • the current of the magnet is regulated in such a way that the armature lever moves slightly beyond the locking position II.
  • the latching current i R is switched off at the time T ⁇ , so that the latching lever 11 can reach the counter latching 3a and holds the valve in the partial stroke position II.
  • the current i M ⁇ of the magnet 5 is regulated so that the lever 3 at T 9 with less
  • the closing magnet Shortly before the valve closing time T s , the closing magnet is switched on again at T 0 , which leads to a movement of the armature lever 3 and the valve 9 until the valve closes and then until the armature lever 3 strikes the yoke 5. This movement is also regulated so that there are low landing speeds for the valve 9 and the armature lever 3. The locking magnet does not have to be energized during this process. As a result of the spring force, the locking lever moves into the locking position I. Subsequently, in (11), the closing magnet is subjected to a controlled current reduction in order to achieve a soft placement of the armature lever on the locking lever. This partial stroke sequence is advantageous at low speeds or low loads and is used in these situations.
  • Fig. 4 shows an embodiment in which the valve stem is held in place of locking by clamping, which is possible in any position of the valve.
  • the drawing shows the structure of a clamping element.
  • a piezo actuator 21 is embedded in a housing 22 which has cutouts for the connections 23 and 23a.
  • the force of the piezo actuator acts on this housing 22 and a transmission part 24, which is supported on a clamping part 25.
  • This is set off accordingly in the clamping zone and consists of a hard material, e.g. B. carbide.
  • the clamping is shown in the upper half of the picture and the freewheel is shown below.
  • the second clamping area is designed as an extension 22a of the housing 22.
  • the clamping zone 22b has hard material.
  • the clamping force is generated via two opposing springs 26 and 26a, which act on the housing 22 and the transmission part 24.
  • the elongated stem 27 of a valve is clamped here. This is also hard in the clamping zone 27a. Acts on the valve stem
  • Actuating element 28 of an electromagnetic actuator which is not shown.
  • the valve is coupled to a valve spring 30 via a spring plate 29.
  • the clamping parts 22, 22a and 22b or 24, 25, 25a are due to the action of the springs 26 and 26a in the clamping position shown above.
  • the piezo actuator 21 is energized and expands in accordance with its physical effect. The expansion acts on the housing 22 as an action force and at the same time via the transmission part 24 on the clamping part 25 and 25a as a reaction force.
  • the clamping element is spread and an air gap is created between the valve stem 27 and the clamping zones 22a and 25a.
  • the spring 30 and the second spring force (not shown) of the electromagnetic valve drive then move the valve in one of the two directions depending on the position of the valve. The clamping is therefore independent of the direction. This condition is shown in the drawing below.
  • the clamping element must be supported on both sides.
  • the electromagnetic actuator is suitable for this.
  • the support 31 is shown hatched in principle above. Since the clamping element has to take up tolerances, a floating bearing is advantageous with a small clearance S. So that there is only a small amount of friction
  • Clamping part 25 provided with sliding elements 32.
  • a valve stem can also be clamped
  • Valve axis are used. This is outlined below and dashed above.

Abstract

L'invention concerne un système de commande servant à actionner une soupape d'un moteur à combustion interne. Un système d'arrêt sert à maintenir la soupape dans au moins une des positions de fin de course et dans au moins une position intermédiaire.
PCT/EP2002/005287 2001-05-14 2002-05-14 Systeme de commande electromagnetique WO2002092971A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US10/477,647 US20040169988A1 (en) 2001-05-14 2002-05-14 Electromagnetic control device
EP02735357A EP1387927A1 (fr) 2001-05-14 2002-05-14 Systeme de commande electromagnetique

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE10123454 2001-05-14
DE10123454.6 2001-05-14
DE10203261.0 2002-01-29
DE10203261 2002-01-29
DE10220199A DE10220199A1 (de) 2001-05-14 2002-05-06 Elektromagnetische Stelleinrichtung
DE10220199.4 2002-05-06

Publications (1)

Publication Number Publication Date
WO2002092971A1 true WO2002092971A1 (fr) 2002-11-21

Family

ID=27214426

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2002/005287 WO2002092971A1 (fr) 2001-05-14 2002-05-14 Systeme de commande electromagnetique

Country Status (3)

Country Link
US (1) US20040169988A1 (fr)
EP (1) EP1387927A1 (fr)
WO (1) WO2002092971A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007045779A1 (de) * 2007-09-25 2009-04-09 Continental Automotive Gmbh Verfahren zur Ansteuerung eines Magnetventils und zugehörige Vorrichtung
DE102011108949A1 (de) * 2011-07-29 2013-01-31 Ceramtec Gmbh Elektromagnetisches Relais

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19521078A1 (de) 1995-06-09 1996-12-12 Fev Motorentech Gmbh & Co Kg Energiesparende elektromagnetische Schaltanordnung
US5673658A (en) * 1995-11-29 1997-10-07 Daimler-Benz Ag Hydraulic-mechanical valve operating mechanism
JPH10231715A (ja) * 1997-02-19 1998-09-02 Hino Motors Ltd 内燃機関
DE19712057A1 (de) * 1997-03-24 1998-10-01 Braunewell Markus Elektromagnetischer Antrieb E 7
DE19712062A1 (de) 1997-03-24 1998-10-01 Braunewell Markus Elektromagnetische Stelleinrichtung
US6267351B1 (en) * 1998-10-27 2001-07-31 Aura Systems, Inc. Electromagnetic valve actuator with mechanical end position clamp or latch

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Publication number Priority date Publication date Assignee Title
DE3739891A1 (de) * 1987-11-25 1989-06-08 Porsche Ag Vorrichtung zum betaetigen eines gaswechsel-tellerventils
US4831973A (en) * 1988-02-08 1989-05-23 Magnavox Government And Industrial Electronics Company Repulsion actuated potential energy driven valve mechanism
DE19518056B4 (de) * 1995-05-17 2005-04-07 Fev Motorentechnik Gmbh Einrichtung zur Steuerung der Ankerbewegung einer elektromagnetischen Schaltanordnung und Verfahren zur Ansteuerung
JPH11135322A (ja) * 1997-07-31 1999-05-21 Fev Motorentechnik Gmbh & Co Kg アーマチュア運動を考慮して電磁アクチュエータを運転する方法
US6302370B1 (en) * 1998-08-26 2001-10-16 Diesel Engine Retarders, Inc. Valve seating control device with variable area orifice
DE50011289D1 (de) * 1999-05-19 2005-11-10 Fev Motorentech Gmbh Verfahren zur ansteuerung eines elektromagnetischen ventiltriebs für ein gaswechselventil an einer kolbenbrennkraftmaschine
DE10037399A1 (de) * 2000-08-01 2002-02-14 Daimler Chrysler Ag Verfahren zur Herstellung eines elektromagnetischen Aktuators

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19521078A1 (de) 1995-06-09 1996-12-12 Fev Motorentech Gmbh & Co Kg Energiesparende elektromagnetische Schaltanordnung
US5673658A (en) * 1995-11-29 1997-10-07 Daimler-Benz Ag Hydraulic-mechanical valve operating mechanism
JPH10231715A (ja) * 1997-02-19 1998-09-02 Hino Motors Ltd 内燃機関
DE19712057A1 (de) * 1997-03-24 1998-10-01 Braunewell Markus Elektromagnetischer Antrieb E 7
DE19712062A1 (de) 1997-03-24 1998-10-01 Braunewell Markus Elektromagnetische Stelleinrichtung
US6267351B1 (en) * 1998-10-27 2001-07-31 Aura Systems, Inc. Electromagnetic valve actuator with mechanical end position clamp or latch

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 14 31 December 1998 (1998-12-31) *

Also Published As

Publication number Publication date
US20040169988A1 (en) 2004-09-02
EP1387927A1 (fr) 2004-02-11

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